期刊
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
卷 87, 期 -, 页码 10-16出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2012.10.002
关键词
Microalgae; Removal; Biodegradation; Bioconcentration; Nonylphenol; Octylphenol
资金
- National Natural Science Foundation of China [NSFC 41103057, U1133005]
- CAS key project [KZZD-EW-09, KZCX-EW-108]
- China Postdoctoral Science Foundation [20110490932]
The removal of nonylphenol (NP) and octylphenol (OP) by the freshwater green microalga Scenedesmus obliquus was studied in cultures exposed to different concentrations of NP and OP for 5 days. In most cases, low NP and OP concentrations ( < 1 mg/L) did not affect the growth, fluorescence transient (F-v/F-m), photosynthetic pigments and cell ultrastructure of S. obliquus, whereas high NP and OP concentrations ( > 1 mg/L) suppressed algal growth. decreased Fv(/)F(m) and photosynthetic pigments, and destroyed algal ultrastructure. S. obliquus had a rapid and high ability to remove NP and OP. After 5 days of culturing, > 89 percent NP and > 58 percent OP were removed by this alga, with the highest removal efficiency being near 100 percent. The removal of NP and OP was mainly caused by algal degradation. Extracellular NP contents of S. obliquus were lower than intracellular NP contents, with the ratios changing from 0 to 0.74. However, most of extracellular OP contents of S. obliquus were higher than intracellular OP contents, with the ratios changing from 0.74 to 2.15. The two alkylphenols exhibited a high bioconcentration potential, with one-day bioconcentration factors (BCF) of NP and OP varying between 3393 to 13262 and 949 to 3227, respectively. After 5 days of culturing, high BCF values were still recorded when NP and OP initial concentrations were higher than 0.5 mg/L. These results demonstrated potential application of this algal species in the removal of organic contaminants including alkylphenols in addition to nutrients and metals. (C) 2012 Elsevier Inc. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据